121022120100 has 144 divisors (see below), whose sum is σ = 406153115648. Its totient is φ = 27249298560.

The previous prime is 121022120083. The next prime is 121022120117. The reversal of 121022120100 is 1021220121.

It is an interprime number because it is at equal distance from previous prime (121022120083) and next prime (121022120117).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 289372 + ... + 570771.

Almost surely, 2^121022120100 is an apocalyptic number.

121022120100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121022120100 is an abundant number, since it is smaller than the sum of its proper divisors (285130995548).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121022120100 is a wasteful number, since it uses less digits than its factorization.

121022120100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860234 (or 860227 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 121022120100 its reverse (1021220121), we get a palindrome (122043340221).

It can be divided in two parts, 1210221 and 20100, that added together give a palindrome (1230321).

The spelling of 121022120100 in words is "one hundred twenty-one billion, twenty-two million, one hundred twenty thousand, one hundred".